I'd base it on time, instead of SQ/FT, it really all depends on how your setup. I'm guessing your only setup to cut up to a certain size and remain competitive after that your out of your league price wise, until you reorganize for the larger size stuff. We don't know your setup so it's hard to judge it looks like your good up to a point.I'm set up for up to about two acres then I start to get out of my league price wise.